Technological Overview on SPEED-5G
SPEED-5G is a 5G-PPP research project focused on developing key enablers for the future 5G standards, addressing the lack of dynamic control across wireless network resources and the intrinsic spectrum load unbalancing.
eDSA – extended Dynamic Spectrum Access
SPEED-5G has proposed the extended Dynamic Spectrum Access (eDSA) technology as the new paradigm for spectrum and resource management. This three-dimensional model provides three degrees of freedom:
- ultra-densification of cellular technology through massive utilization of small cells,
- rationalized traffic allocation over heterogeneous wireless technologies, and
- better load balancing across available spectrum for effectively supporting the new 5G Quality of Experience (QoE) requirements through disruptive spectrum management techniques.
Use Cases and Scenarios
SPEED-5G is investigating the central use cases and scenarios envisioned for 5G, including indoor and indoor/outdoor scenarios where capacity demands are the highest, but also where the eDSA will be the most effective at exploiting co-operation across technologies and bands. In respect to the addressed use cases, SPEED-5G will provide solutions for evolved Mobile Broadband (eMBB), massive Machine Type Communications (mMTC), Ultra-Reliable and low-latency Communications (URC) and high-speed mobility.
In our vision 5G will have different deployment phases, which are crucial for ensuring a seamless transition to 5G greenfield environments for operators, as 5G will constitute a new paradigm of network deployment and management.
In the first phase, SPEED-5G technologies will be introduced to co-exist in a backwards-compatible way with widely deployed legacy technologies. The goal is to maximize the existing investments and add value on top of them, aligning the operation of legacy technologies with the new 5G paradigm.
In the second phase, a new Radio-access Technology (RAT) without backward-compatibility requirements will emerge, and in the long-term this new air interface will be migrated into existing spectrum. For this phase, SPEED-5G is designing a new flexible air interface using FBMC waveforms with eDSA enabled L2 and L3 layers, addressing as well the co-existence amongst multiple RATs for 5G’s first phase.
Enhanced Radio Resource Management and Spectrum Utilization
In the context of the two envisioned deployment phases, the new MAC layer will provide efficient management and MAC mechanisms for the sharing of lightly-licensed spectrum bands at 2.3GHz and 3.5GHz exploiting LSA techniques as well as of the available unlicensed spectrum at 5GHz and below 1GHz (TVWS), while the SPEED-5G will provide enhanced, multi-RAT and context-aware, service-oriented radio resource management and allocation schemes that will offer capacity and coverage extension as well as improved spectrum utilization in dense and ultra-dense networks for supporting ultra-broadband wireless and massive IoT applications.
The new air interface of SPEED-5G will provide native support for eDSA technologies using licensed, unlicensed and lightly-licensed spectrum using both non-contention and grant-free contention based Random Access (RA) mechanisms through the development of a new MAC layer and new RRM mechanisms to cope with the eDSA paradigm. This is fully supported by our 5G architecture proposal, where SDN and NFV play a key role in order to achieve the main goals of a dynamic and fully re-configurable 5G network.
Óscar Carrasco Quilis, Sistelbanda
SPEED-5G Project Coordinator